Composition of matter for increasing the strength and durability of cements, &amp; c.



.VUI UUlVlf UOI I IUHO,

92 If" v COATING OR PLASTIC.

-UNITED STATES P TENT- OFFICE.

HENRY JAS. LIVINGSTON, OF BALTIMORE, MARYLAND.

COMPOSITION OF MATTER FOR INCREASING THE STRENGTH AND DURABILITY OF CEMENTS, &c.

SPECIFICATION'forming part of Letters Patent fie. 682,724, dated September 17, 1901.

Application filed December 4, 1900.

To all whom it may concern:

Be it known that I, HENRY JAMES LIVING- s'roN, asubject of the Queen of Great Britain, residing at Baltimore, in the State of Maryland, have invented a new and useful Composition of Matter for Increasing the Strength and Durability of Cements and Plaster-s and the Process of Making the Same, of which the following is a specification.

- The composition consists, substantially, of

one hundred parts, by weight, of carbon in powder; twenty parts, by weight,o a a me matter Isoluble, I and two parts, by m sacc arms or arinaceons or soluble carbonaceous ma er. n a co e or an rac1iecoal, with soda c vstals Isal-sodaI and sugar 1n proportions as above, give excelfent resu s.

The composition is prepared for use by mixing the materials, substantially in the proportions specified, with water, thoroughly digesting the same, then evaporating the water, and pulverizing the residuum.

I find that five er cent. of this composition added in a ow ere 01m 7 ocemen sor asters'ar ground'w'itli themis often afiout x 1mes as eificacious in increasing their strength as compared with that afforded by the addition of crude or unprepared carbons,

such as employed in composition described Serial No. 38,708. (No specimens.)

in United States Patent No. 620,155. This increase of strength over that aiforded by the crude carbons is attributable to the action of the soluble alkaline matter now introduced. More or less of the composition may be used as desired and according to the quantity of free lime present in or added to the cement, and a little insoluble alkaline matter may be admitted to the composition before digestion.

What I claim, and desire to secure by Let- 4o ters Patent of the United States, is-

1. The above-described composition of matter consisting of carbon; soluble carbonaceous matter; and a salt of soda; substantially as described and for the purpose specified.

2. The process of preparing a composition for strengthening cements or plaster whichv consists in mixing carbon in a powdered form, soluble alkaline matter, and soluble carbonaceous matter, in substantially the proportions 5o specified,-with water, then evaporating the mixture to dryness, and finally in pulverizing the product thus obtained.

In testimony whereof I aflix my signature in presence of two witnesses.

HENRY JAS. LIVINGSTON.

Witnesses:

J me A. WATSON, ARTHUR L. BRYANT. 

